US3916669A - Multiple aperture die - Google Patents

Multiple aperture die Download PDF

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Publication number
US3916669A
US3916669A US523404A US52340474A US3916669A US 3916669 A US3916669 A US 3916669A US 523404 A US523404 A US 523404A US 52340474 A US52340474 A US 52340474A US 3916669 A US3916669 A US 3916669A
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US
United States
Prior art keywords
die
apertures
group
groups
centered
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US523404A
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English (en)
Inventor
Jr Francis Joseph Fuchs
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AT&T Corp
Original Assignee
Western Electric Co Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to US523404A priority Critical patent/US3916669A/en
Application filed by Western Electric Co Inc filed Critical Western Electric Co Inc
Priority to US05/619,130 priority patent/US3948079A/en
Priority to CA238,370A priority patent/CA1036106A/en
Priority to GB45027/75A priority patent/GB1508148A/en
Publication of US3916669A publication Critical patent/US3916669A/en
Application granted granted Critical
Priority to FR7533967A priority patent/FR2290966A1/fr
Priority to DE19752550306 priority patent/DE2550306A1/de
Priority to CH1466175A priority patent/CH604952A5/xx
Priority to JP50135742A priority patent/JPS5834202B2/ja
Priority to CA294,633A priority patent/CA1038798A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C25/00—Profiling tools for metal extruding
    • B21C25/02—Dies

Definitions

  • PROFILE SUCH AS THE LIFT FORK OF A LIFTING DEVICE, AND METHOD OF MANUFACTURING SAME Inventors: Ernst Schmidt, Sven Lennart Ingestad, and Sven Ewert Lindell, all of Mjolby, Sweden Assignee: AB Pygg- OCH Transportekonomi (BT), S 161 11 Bromma, Sweden Filed: June 18, 1974 Appl. No.:480.5l5
  • ABSTRACT A starting sheet like material has a first peripheral portion bent to a suitable obtuse angle. for example 120, and then the same bent part is bent further to an acute angle, for example 45. A peripheral portion of the material adjacent the first bent portion is bent to an approximately right angle and the first bent portion is bent further in fully towards the underlying material of the starting sheet. Then, the previously bent peripheral portions and at least an additional part of the periphery of the profile are further bent at about a. right angle to arrive at a profile having a high degree of strength.
  • FIG/A mizzzl FIG/B FIG/C Sheet 1 of 3 The present invention is directed to a method of manufacturing profiles, especially steel profiles intended for the lift forks of lifting devices, by means of shaping the starting material in a series of defined, consecutive steps, and to the resulting profile.
  • the object of the present invention is to eliminate all these drawbacks while providing a method for manufacturing of lift forks which is considerably simplified and cheapened and adapted to mass production.
  • a method of manufacturing a profile from a starting sheet-like material comprises bending a first part of the starting material at its edge to a suitable obtuse angle, for example 120 (FIGS. 2A and 2C), to form one end of the intended profile; then bending further the same first part of the material bent in the first step to an acute angle, for example 45 (FIG. 3C); bending of an edge portion of the material farther away from said one end of the intended profile to an approximately right angle (FIG. 3D); then bending further the same first part of the material, now at the acute angle, in fully towards the underlying material (F IG. 4C); and then bending more of the material around at least an additional part of the periphery of the profile to form a completing, mainly right-angled edge (FIGS. 5A-5 D) to arrive at a profile having a high degree of strength.
  • a suitable obtuse angle for example 120
  • FIG. 3C suitable obtuse angle
  • FIGS. lA-lD show the starting materiaha sheet or plate of steel or other suitable material of appropriate form and thickness, possibly with one or several holes in the vicinity of its one end, Figs. lB-lD being cross-sections taken at B-B, C-C and D-D, respectively;
  • FIGS. 2A-2D show the material in the vicinity of said end after bending to an obtuse angle a, FIGS. ZB-ZD being cross-sections taken at B-B, C-C and D-D, respectively;
  • FIGS. 3A-3D show the material after bending to the angles b and 0, FIGS. BIB-3D being cross-sections taken at 5-8, C-C and D D, respectively;
  • FIGS. 4A-4D show the material after bending the portion at angle b in towards the underlying material, FIGS. 4B-4D being cross-sections taken at 8-8, C-C and D- D, respectively;
  • FIGS. 5A-5D show the material after further material has been bent around substantially the whole periphery to an approximate right angle d, FIGS. 5B-5D being cross-sections taken at B-B, C-C and D- D, respectively.
  • a sheet of starting material 1 preferably a steel sheet, illustrated which has a hole 2 therein.
  • the starting sheet 1 may include more than one hole 2, or may have no holes therein, depending upon other design considerations.
  • the hole 2 may be provided for access to rolling wheels provided at the forward end of the fork.
  • the starting peripheral portions 3 and 4 of the material 1 are bent to an obtuse angle a, for example so as to provide a profile as shown in cross-section in FIG. 2C.
  • the remaining portions of the starting sheet I are not bent in the first step.
  • the peripheral portions 3 and 4 of the material which were initially bent in the first step are now further bent fully in towards the underlying material of the starting material I.
  • the portions 5 and 6 are not bent in this step.
  • the peripheral portion resulting in the vicinity of the bent over portions 3 and 4 are further bent up to a substantially right angle (1 as illustrated in FIG. 5C.
  • the remainder of the peripheral portion of the starting material is bent to a substantially right angle a as shown in FIGS. 58 and 5D so as to provide a profile having the whole periphery thereof bent, except for the rear end of the profile which, in the case ofa fork lift truck, attaches to the lifting mechanism and is not required to be bent.
  • the front bent over portions 7 and 8 are bent over at approximately right angles d, and as shown in FIG.
  • the portion of the underlying material 1 adjacent the peripheral portions 5 and 6 are also bent over at approximately right angles cl so as to form a generally U-shaped structure, in cross-section, at the peripheral edges of the profile in the vicinity of the portions 5 and 6.
  • the portions 3 and 4 have double bent over construction so as to enhance the structural strength of the resulting profile at these points. If necessary,
  • the double-bent over construction illustrated in FIG. 5C can be extended over a greater length of the resulting profile, depending upon strength requirements of the resulting item.
  • the resulting device as illustrated in FIGS. 5A- 5D has remarkable strength and the manufacture thereof is considerably simplified and cheapened, thereby better adapting same to mass production. Further, since the construction is simple, fewer defects exist in the resulting item, thereby rendering the invention still more economical. Additionally, less skilled manufacturing personnel is required for producing devices according to the present invention as compared with the prior art Welding method.
  • the present invention is particularly suitable for use in manufacturing lift forks for fork lift trucks.
  • Method for manufacturing profiles such as steel profiles for the lift forks of lifting devices, from a sheet or platelike starting material comprising:

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Of Metal (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
US523404A 1974-11-13 1974-11-13 Multiple aperture die Expired - Lifetime US3916669A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
US523404A US3916669A (en) 1974-11-13 1974-11-13 Multiple aperture die
US05/619,130 US3948079A (en) 1974-11-13 1975-10-02 Multiple aperture die
CA238,370A CA1036106A (en) 1974-11-13 1975-10-27 Multiple aperture die
GB45027/75A GB1508148A (en) 1974-11-13 1975-10-30 Dies
FR7533967A FR2290966A1 (fr) 1974-11-13 1975-11-06 Filiere a plusieurs ouvertures
DE19752550306 DE2550306A1 (de) 1974-11-13 1975-11-08 Matrize
CH1466175A CH604952A5 (de) 1974-11-13 1975-11-12
JP50135742A JPS5834202B2 (ja) 1974-11-13 1975-11-13 ダイスガタ
CA294,633A CA1038798A (en) 1974-11-13 1978-01-10 Multiple aperture die

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US523404A US3916669A (en) 1974-11-13 1974-11-13 Multiple aperture die

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US05/619,130 Continuation US3948079A (en) 1974-11-13 1975-10-02 Multiple aperture die

Publications (1)

Publication Number Publication Date
US3916669A true US3916669A (en) 1975-11-04

Family

ID=24084861

Family Applications (1)

Application Number Title Priority Date Filing Date
US523404A Expired - Lifetime US3916669A (en) 1974-11-13 1974-11-13 Multiple aperture die

Country Status (7)

Country Link
US (1) US3916669A (de)
JP (1) JPS5834202B2 (de)
CA (1) CA1036106A (de)
CH (1) CH604952A5 (de)
DE (1) DE2550306A1 (de)
FR (1) FR2290966A1 (de)
GB (1) GB1508148A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4969794A (en) * 1989-09-29 1990-11-13 Larsen Kurt K Portable pallet truck
US6146081A (en) * 1998-04-01 2000-11-14 Anderson; Deloren Edward Multi-tine lifting implement

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4185456A (en) * 1976-07-02 1980-01-29 Cummings Donald Ray Providing energy from the combustion of methanol

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2973092A (en) * 1957-01-28 1961-02-28 Int Nickel Co Production of metal articles by extrusion
US3740985A (en) * 1971-11-17 1973-06-26 Western Electric Co Apparatus and method for continuous extrusion

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2973092A (en) * 1957-01-28 1961-02-28 Int Nickel Co Production of metal articles by extrusion
US3740985A (en) * 1971-11-17 1973-06-26 Western Electric Co Apparatus and method for continuous extrusion

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4969794A (en) * 1989-09-29 1990-11-13 Larsen Kurt K Portable pallet truck
US6146081A (en) * 1998-04-01 2000-11-14 Anderson; Deloren Edward Multi-tine lifting implement

Also Published As

Publication number Publication date
JPS5171259A (de) 1976-06-19
FR2290966A1 (fr) 1976-06-11
DE2550306A1 (de) 1976-05-20
FR2290966B1 (de) 1980-04-30
CH604952A5 (de) 1978-09-15
GB1508148A (en) 1978-04-19
JPS5834202B2 (ja) 1983-07-25
CA1036106A (en) 1978-08-08

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